Rails Minitest style 指南

In the test,  we should use the ‘describe’,  ‘context’, ‘it’ structure.

Here I use a controller test as an example.

I have this my_controller.rb with two controller actions:

class MyController < ApplicationController  def controller_action_1  # Code goes here  end  def controller_action_2  # Code goes here  endend

And controller test file my_controller_test.rb:

require ‘test_helper’class MyControllerTest < ActionController::TestCase  # Initialize the variables that will be used in all describe block tests within MyControllerTest class  before do    v_block = ‘this variable is only accessible in this block’    @v_describe_level = ‘this varible is accessible in all describe blocks’  end  # Test for controller action 1  describe ‘#controller_action_1′ do    # Intialize the variables that will be used in all context block tests within this describe block    before do      v_block = ‘this variable is only accessible in this block’      @v_context_level = ‘this varible is accessible in all context blocks’    end    context ‘when the user is admin’ do      # Intialize the variables that will be used in all it block tests within this context block      before do        v_block = ‘this variable is only accessible in this block’        @v_it_level = ‘this varible is accessible in all it blocks’      end      it ‘must has admin role’ do        # Code goes here. Examples: http://ruby-doc.org/stdlib-1.9.3/libdoc/minitest/spec/rdoc/MiniTest/Expectations.html        # must_be        # must_be_empty        # must_be_nil        # must_be_same_as        # must_equal        # must_raise        # wont_be        # wont_be_nil        # wont_equal        # wont_include      end      it ‘must redirect to admin management page’ do        # Code goes here, example:        # assert_redirected_to      end    end    context ‘when the user is not admin’ do      it ‘must not have admin role’ do      end      it ‘must redirect to non-admin management page’ do      end    end  end  describe ‘#controller_action_2′ do    # Code goes here  end  private  # Helper functions goes hereend

Some reminder:

1. Given, When, Then

2. Use fixture instead of creating data on the go

3. If no Before block, don't need to use context